some people may disagree with me but please listen to me when i say dont go to dover unless you have a ticket for the ferry or money for the ferry. i have heard that it is possible to hitch onto a ferry but we tried for two days and no such luck. if you do for some unfortunate reason get stuck in dover there are a few places that we found outside that are ok to sleep at. the first one is by the cemetery near the estern docks just go up the hill and pick a spot. the second is better. go to the riad that leads up the hill to dover castle and you will see a fence at the base and a whole bunch of trees hop the fence and walk in far enough to not be seen. this place was perfectly concealed. but its better if you just dont go to dover. it sucks.